Question
Pierre and Tammy were in a roller skating race. Pierre was travelling at a constant speed of 21 km/h and they both did not change their speed. When Tammy completed half of her race, Pierre was 2.1 km ahead. Pierre completed the race at 9.55 a.m. What time did Tammy complete the race?
3 m

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Pierre and Tammy were in a roller skating race. Pierre was travelling at a constant speed of 21 km/h and they both did not change their speed. When Tammy completed half of her race, Pierre was 2.1 km ahead. Pierre completed the race at 9.55 a.m. What time did Tammy complete the race?